\documentclass{article}
\begin{document}
\section{Error de R}
\begin{equation}
	R = {V_{0} - V_{pc} \over I_{pc}}\\
\end{equation}
\bigskip
\begin{equation}
	{\Delta R \over R}= {\epsilon_{R} = |{1\over I_{pc} \times R}|\times 2\Delta V + |{(V_{0}-V_{pc})  \over  I_{pc}^2  \times R}| \times \Delta I_{pc}} \\		
\end{equation}
\bigskip
\begin{equation}
	{\epsilon_{R} = |{1\over V_{0} - V_{pc}}|\times 2\Delta V + |{1 \over  I_{pc}̣̣̣̣}| \times \Delta I_{pc}} \\	
\end{equation}
\bigskip
\section{Error de $\mu_{c}$ }
\begin{equation}
	 \mu_{c} = {V_{0} - V_{pc} \over V_{0}} = 1 - {V_{pc} \over V_{0}}\\
\end{equation}
\bigskip	
\begin{equation}
	{\Delta \mu_{c} \over \mu_{c}}= {\epsilon_{\mu_{c}} = |{1 \over V_{0}}|	\times \Delta V_{pc} + |{V_{pc} \over V_{0}^2}|\times \Delta V_{0}}
\end{equation}
\bigskip

\end{document} 









